My system is composed by:
ESS & Multiplus Configured for:
In my zone it's normal for a period of the year to suffer grid blackouts. They can be from minutes to several hours, but I have no problem with quality.
When a blackout happens, the system behaves correctly.
When the grid returns, the multi charger starts itself, sometimes faster than others, but the loads on ac-out1 only receive energy from the grid. The mppt continues to serve energy from the panels, but only for the battery charge and all loads are supplied from the grid.
Also, it seems to be a problem with energy flow management as it's intermittently reporting big loads on ac-in, when I don't have anything connected to it.
The problem persists (waited hours) until the Multiplus is hardware-restarted by completely turning it off, waiting and then turning on again (switch at the bottom)
This is a big problem for me, as I mention there will be blackouts. I like the possibilities of ESS but If I can't solve this, I'll be forced to migrate it to virtual switch, and that's not optimal for the size of my system.
Also I noticed that while the blackout, the charging phase always show "Inverting" and the Victron nodes, mqtt, etc, all output alike. I would like to know where I can report this as an issue, like in some git project. Not reporting the battery charging phase does disallow making automations based on this data. It's valuable for diverters, for example, as the setpoint should be different on every stage.
With the pass of days I'm seeing that the changes/problems are more extense. I'm concerned about two of them:
Before, it charged the battery until absorption at full throttle. Now it charges at low power (@1500w max.) even when more solar yield is available, as it is applying some kind of manager that wants to extend the charge to the full day. That's not good because in my region the available sun is scarce, and I have to get the battery full as soon as possible.
Then there is a strange behaving after the absorption phase. I have Float 0,3v lower than absorption. Before when absorption ended it gently left the battery alone (power between 0 and 20w, and slowly with the normal use it reached float. Now it applies a constant -200w load that is steady for more than 1 hour. I don't know if that's a false measurement (possibly), but the effect is that no other diverting appliances can be used in float, as it always reports negative power to the battery, while loads are successfully supplied by solar.
What should this mean?
My interpretation is Charging is allowed and discharge is not allowed.
What it really means in my ESS instalation.
"Discharge is not allowed, but charge at maximum current possible."
When "Allow to discharge" is set to NO, the "Low battery"-led starts to flash, and multiplus starts to charge with maximum charge power, it disregards state of charge, it ignores ESS set points... it just charges.
I use the 2-wire BMS assistant with ESS.
The allow to charge works as it should. When NO it stops charging, when set to YES it charges, if ESS grid point allows it.
I am on latest firmware on the multiplus-II and VenusOS is 2.80-ish (same behaviour on lower venusos as well)
Is this not a bug? Am I the only one?
I’m running a ESS system with new Multiplus 2 48/3000 And a MPPT 150/35 with VEdirect. It has 2-wire bms on it which all works fine. But when the multi is switched off or disconnected by loose cable or something the MPPT goes from network controlled to standalone and won’t stop charging. before I had an multigrid2 and everything was running well, when multi disconnected the MPPT stops and I get a warning ‘no bms’. Already updated everything, but how do I get the MPPT back to ‘bms controlled’?
I've noticed a problem in a 45kVA ESS system recently installed. Here is the set-up:
System works well in general, however there appears to be a conflict happening on the days when the batteries reach the 15% minimum SOC:
At night, when the battery power has been used, the system correctly goes into #1 low SOC mode and draws no more power from the batteries, and pulls from the grid.
The problem is that the following morning, when enough PV power is available, it keeps throttling back the PV inverters to only match demand. So for example: when there is 10kW of solar available and 5kW of consumption with a 2kW grid set-point; it will only produce 3kW… instead of producing the full 10kW and start charging the batteries.
I can manually “kick-start” the system out of this dead-lock, simply by lowering the minimum SOC to 10% and restoring it 15%. The #1 state then disappears and the full 10kW is produced, charging the batteries in the process.
Having studied this over several days my theory is that there is a conflict occurring between the “phase compensation” in off-position and “zero feed-in” Fronius control.
Please note I have “no phase compensation” and “zero feed-in” set, because at the moment the system registration is being processed and no feed-in on any phase is recommended. I also have a conservative 2kW grid set-point to minimize momentary feed-in too.
My theory (and it’s only a theory) is that when low SOC #1 setting is functioning no more discharge of any type is allowed- this in effect, conflicts with the “no phase compensation”: it won’t discharge on any of the phases (good), but for some reason it won’t charge on any phases either (bad). It’s like it isolates the batteries from the system- neither charging nor discharging. The system throttles back the Fronius PV inverters in order to match Consumption minus grid set-point – instead of charging batteries with the excess solar available. And so the system stays stuck in low SOC, #1 until I kick-start it by clearing the #1 condition.
Does anyone have any explanation for this? Is this an issue Victron are aware of?
P.S. I’ve attached some screenshots: 2 of the ESS settings and 1 of the system in normal, correct operation- it hasn’t reached low SOC in the last week or so, so haven’t been able to capture that- but at least you can see how the system is set up.
I'm currently using 2x MP2 in parallel as an ESS recently I started to do grid balancing and charging batteries at cheaper rate from the grid, naturally since energy is cheaper I'm using more loads in the house as well, I've noticed my grid connection is getting pretty close to the limit when batteries are charging and using the shower at 72A.
Grid connection is 100A but I have my own fuse of 80A (so I don't blow the suppliers fuse and for electrical regulations)
Would there be a configuration/assistant, to throttle back the charging so not to exceed the grid connection? At this moment it's unlikely to blow the fuse but I have the third MP2 on the wall, haven't connected it yet, once I connect it chances are I'll blow the fuse.
The ideal solution would be a setting similar to Feed in limitation in ESS assistant.
Thanks in advance.
I could use some help defining the disconnect frequencies in ESS for my PV inverter shown here; any help is appreciated!:
I live in the US, my inverter is 60Hz first off, these are default values I have not modified yet. My Inverter is a SolarEdge HD10000-H US. Active Power control via frequency is defined here in the manual, and can be set by the user:
It would seem that "P0 in my inverter relates to "The solar converter will start reducing its output power at XX Hz", I am guessing that P1 would be the next setting "Output power will be reduced to minimum when frequency is at XX Hz".. I am not sure what to enter for the final disconnect value though. The full manual on Power Control can be found here, https://www.solaredge.com/sites/default/files/application_note_power_control_configuration.pdf
Can anyone provide any recommendation as to how I should configure this in ESS and which values should be selected for P0 and P1 in my inverter?
I run multiple installations on multiple sites, all on a three phase grid connection (Germany: phase compenastion: "total of all phases") using a single Multiplus II on L1 with batteries in ESS mode. Some sites use an EM24 others ET340, they all have one problem in common:
as soon as any generator (PV) is connected to any other phase than L1 (or also three-phase, in this case usually Fronius SYMO), the summation of "power used" or "power origin" on the VRM goes completly wrong.
In the last case there were two "dumb" inverters, which I connected through two ET112, also these I had to both switch to L1 due to the fact that there is no easy way to set the ET112 to tell the Venus "I am L2 or L3".
The setpoint is fine, so purley cosmetic but to show customers their real data is important.
Is there a way to fix that? I see a huge potential in those small systems with 4.8 or 7kWh capacity, as this in the average household apprx. doubles self consumption and in most cases is enough to cover the night and some peak-loads during the day.
I know there are some more threads covering he problem of "sum of all phases" in the German market, I found none with this specific one though.
Thank you very much for your help!
Greetings all, I'm in the process of getting my solar installation fully operational but after reading a bunch about Anti-Islanding I am still not sure if I need to have that. I'm planning to have a setup where I use all of my energy production locally with no feeding back to the grid. I do want the Quattro device to be able to leverage the grid when solar output is low. Diagram attached shows my setup. Anyone able to shed light on how to proceed?
Is there a way to open the AC-input relais on MultiPlus-II by a command submitted to GX-device or with an input signal on MultiPlus-II when using ESS- instead of a virtual switch application? I would like to avoid placing an additional motor-switch or relais in between grid and MultiPlus device.
Hello Victron fellows,
I have set some Li ion with Victron inverters, always for self consumption with PV inverters, but this one is cracking me up. This system consists in three 48V Multiplus II 3000/35 as a three phasic system, and an ESS assistant is set. The sustain voltage is 43V and cuttoff around 42V. The modules have a low SOH, but the system should work anyway. It charges and discharges correctly, up to the point where my BMS disables allow to discharge at around 48V, because there are low cells (it should discharge to less than 42V if it was good).
Then, Sustain mode is active and the current goes UP TO 90A. Of course when this happens the voltage raises quickly, the allow to discharge comes on again and it goes to Discharging mode. Repeating the process endlessly - Even without PV POWER, that means it consumes a lot of power.
My question is, why does it go up to 90A, since sustain mode should be 5A per unit and how can I solve this?
Thank you very much!
several days ago i posted this question:
I have 12 lead batteries, 6 solar panels
an easy solar 24/3000 |70 |230
a mppt 150/70 and a color control GX that I use in remote control on my LAN.
When the weather is grey or when it rains, I switch my inverter to charger mode only.
When I switch back to ESS mode, I no longer have access to the remote control.
I have to deactivate the remote control, reboot the color control GX, reactivate the remote control and reboot.
Thank you for your help.
and I didn't get an answer
I've noticed the addition in DVCC the ability to limit the managed battery charge voltage to a value of my liking. I am very happy, that this is finally possible now.
Now, I would like to set this maximum charge voltage using Home Assistant.
Inside my Modbus TCP services, I have access to com.victronenergy.systems.
According to CCGX-Modbus-TCP Register-list.xlsx, the only writing-enabled registers com.victronenergy.systems are the CCGX-relay-states.
Is there any possibility set the Maximum Charge Voltage per Modbus TCP from Home Assistant? If yes, what is the register of this service?
I had this setup running flawlessly without alarms (except due to imbalance at start) for almost 1 year and in the last month I started to get High Voltage alarms. I have been in touch with Pylontech and tell me that is victron causing it due to high charge voltage... But I have all the settings lowered twice in the last week and I still get this issue.
Looking at battery voltage-current graph, on the left we can see how in the night the battery gets charged (with the grid) and regulates very well and keeps the max voltage on batteries around 51,52V quite stable.
On the right we can see how the battery its charged during the day, with excess solar but firstly it does not charge as smoothly as with grid (even it is charging at less amps) then once charged tthe battery voltage keeps shooting up until sometimes reaches even 54V.
What is causing victron to work differently during the night and day?
Here are the limits configured in VEconfigure and even limited on DVCC too. As pylontech support recommended.
Should I even lower more the maximum charge voltage? I even limited the charge current to 2A during a few days and still got overvoltage alarms.
I have checked and all cells are balanced thus no idea what else might be going on.
Looking forward to some experienced Victron member to illustrate me why during the night and day is different.
I'm looking for a grid meter for use with Energy Storage System design. I live in the US, with split-phase 240VAC power, my home has 200A service, phase angle is 180*.
Would the Carlo Gavazzi EM24DINAV53DISX work? I wasn't sure since it's marketed as 230VAC 3-Phase compatible which is not available in the US.
Hi, I am having toughts of running 2 x Multiplus in paralell with a single phase system, and maybe expanding up to a total of 4 later on. Using 1 source of single phase AC (230V) from grid.
I have a couple of questions:
in the dashboard you have power that is going to the grid and power that is taken from the grid.
in my system a 3 phase system. ( 3 x multiplus 2 , smarthsunt, mppt, ccgx an ac coupled pv system.) is there a little problem withe the calculation af the power.
when i sending power to the grid on phase 1 lets say 1 kw and i using 1 kw on phase 2 the energy meter from the grid stays on 0. what is normal in this case.
but in the victron dashboard its counting the 1 kw that i am sending on phase 1 on the to grid counter.
and the 1 kw that i am taking from te grid it is counting on the from grid counter.
is it posible to disable this an to use the same calculation that the grid meter is using ?
phase compensation is enabled in the ess system now.
Looking for a solution: using an ESS system, when homebattery is fully charged, ideally the excess solar power now is used to charge the EV if it is plugged in. Has anyone worked on such project? There are solutions to charge an ev with excess solar, but this doesn't include a battery in the system.
This one can be programmed together with the victron if i am correct, but have litteraly zero experience with this. Any thoughts?
Hallo und einen schönen Abend in die blaue Runde
Ich bin gerade beim Durchsehen der Checkliste für "die Anmeldung einer Energieerzeugeranlage" im Netz der E-DIS...
Ein Punkt lautet :
"soweit im jeweiligen Anschlussfall erforderlich: Zertifikat für die Leistungsflussüberwachung am Netzanschlusspunkt
gemäß VDE-AR-N 4105"
Ich möchte eine Anlage mit "0" Einspeisung und einen EM24 installieren
Habe bisher nur eine Herstellererklärung-ESS gefunden
Gibt es dazu irgendwelche zusätzlichen Informationen die ich noch nicht entdeckt habe ...
Danke schonmal an Euch
Hi, I have a Multiplus II 3000 24V with a 7kWh LiFePO4 battery in a campervan that's connected to my houses mains supply.
I have ESS installed and using the scheduled charging setting on the Cerbo as I have a very low electricity rate in the night. This works great!
I've tried setting the Grid Setpoint to -250W to offset the base load of the house during the day when electricity costs are high but it seems the most I can feed back in is around 80W. It doesn't matter how low the Grid Setpoint value is set, it never feeds in more power.
Am I missing something here?
Ik heb thuis een multiplus II GX aangesloten op het Net met een 10Kw lithium batterij.
Alles in mooi aangesloten zoals het in de manual beschreven staat en het systeem werkt ook gewoon perfect, Maar nu is de keuring langs geweest om het systeem te keuren en dat wilde hij niet doen omdat de omvormer in serie was aangesloten met het electriciteitsnet en niet in parallel. (Ik vertelde hem dat dit systeem enkel maar in serie kan worden aangesloten en dat alle meet apparatuur vanbinnen in de multiplus aanwezig is, en dat dit toestel aan alle veiligheids voorzieningen voldoet en gekeurd is door Synergrid belgie)
Kan iemand mij helpen met info of voorbeelden van iemand anders die dit ook zo gedaan heeft thuis, zodat ik dit kan voorleggen aan de keurder? Of heb ik zelf iets over het hoofd gezien?
In bijlage de schets van hoe het is aangesloten:
Met vriendelijke groeten
Im using a single MP2 at this moment for an ESS system with a ET340 grid meter. The multi is connected to L1. On L3 there is nothing connected but every now and then i got a spike of about 6000watts positive and negative, its about 3 or 4 times a day.
I recently replaced my ET340 cause i'd expect it to be broken but the same thing is still going on.
The weird thing, it is not visible on the VRM but when i read all values trough modbus TCP i find this back in my logging on Grafana.
Thanks and regards!
(I'm a newbi in posting to this community, please be kind to me
If I doesn't "present" my problem in the short, clear and detailed way. :-)
I see a lot of posts related to MPPT's that are holding back there power.
But none of them seems to be an exact match for my problem.
In my ESS configured system i have a feed-in limit set to 12kw, witch I cant reach at the moment.
But i have seen 10+kW.
My house is supplied by 3-phase 16A grid.
I have one Multiplus-II 5000 on L1 and another on L2 configured as 2-phase..
In front of my Multi's I have a SMA TriPower 7kW.
Could someone please help me to understand, and help me fix the problem I have.
More detailed info you will find in supplied PDF.
My ESS issue 21-09-07 with feed-in Active.pdf
Please post me if additional info is needed!
I really want to solve this issue asap.
How does one setup up an ESS system with PV inverters on both input and output? Currently it seems you have to choose either input or output but not both.
Good afternoon, just started a new Multipluss II 3 phase with Pylontech batteries. All firmware in MP/CCGX/MPPTs has been updated (as I read in a previous post there was a bug which has since been fixed). However, the ESS is not showing up in the CCGX. The system has been configured already.
Je viens de terminer une installation ESS avec un EasySolar II GX 48/3000 et des batteries Pylontech, un CPI sur le DC (car 210Voc), et je suis en train de remplir le dossier consuel.
Et là, impossible de trouver le certificat vde0126 pour le easySolar II. Il est disponible pour le multiplus II pour la France, mais seulement pour les autres pays pour le easySolar II
Du coup comment faire pour le consuel ?
Good day all .
I have a victron quattro 5kva setup with a mppt 250/100 and 10kwh of lithium batteries. Ac input 1 has mains electricity. Ac input 2 has generator input. Now with out the ess assistant geneator charges batteries and supplies loads through the inverter with no issues .
When i enable ess assistant the system functions with solar and grid energy as required. However should the user require generator to backup power or charge the battery the inverter will constantly flip on and off between charge and not charging . The relays will stay on for about 2 mins and off . Then on again then off again. To try all options we have disabled ups mode. And enabled weak ac input. This still doesn't make a difference. I can only assume that this has something to do with grid feed in which is set to grid type other with no feed in . Loss of mains on both ac input 1 and 2 is set to type b safe .
Would changing the type b to disabled on the ac input 2 correct this problem with no adverse effects on the 14kva generator input 2 ??
Or should i be looking for another solution .Thank you in advance for your help and assistance.
Hi. On a 3 phase system. I see the critical loads on the Colour control home screen displayed as L1, L2, L3. All good. But when I go to the advanced menu on VRM critical loads are only displayed as L1. I am hoping to see all 3 phases on the critical chart for phase balancing purposes etc.
I have a 3-phase Multiplus II system with BYD batteries & AC coupled Solaredge with some DC coupled PV for black-start scenarios.
I use frequency shifting to control the Solaredge production. I can see the Solaredge ramp up/down according to the frequency changes.
I also use DVCC->Limit Charge Current to slowly charge the batteries each day and maximise the usage of the DC PV (it does not export). If I turn off the charge limiting, the Multiplus II's work hard, spin up their fans which can be heard inside the house so I want to keep it on.
If I drop the grid to the system, the Limit Charge Current setting seems to interfere with the frequency shifting to the point where the battery discharges rather than increase the AC coupled production to cover the load.
Limit charge current set to 50A, Victron setting the frequency to 50.9Hz:
Limit charge current turned off, Victron setting the frequency to 49.9Hz
[image]Does anyone have any ideas?
I am in the final stages of designing a battery backup system with the Multiplus II. The main purpose of the Multiplus II would be to have a backup power source for when the grid goes down. The Multiplus II would be fed from the grid to ensure the batteries remain fully charged. This would be the first stage of the install and gives me a very good indication of the power draw throughout the day for my critical loads.
The second part of the install would be to connect a PV system (MPPT) that would keep the batteries charged throughout the day. I would then allow a certain % discharge going into the evening. The PV array will be sized based on the power draw of the critical loads and the solar yield on an overcast day on the shortest day of the year (New Zealand - relatively high sunlight levels). On sunny days there will always be excess power available and I would like to dump the excess power into a hot water cylinder. I am looking at including the fronius Ohmpilot that would be connected to the AC-out (non critical load) of the Multiplus II. This way there will only be limited amount of power going back into the grid. I will only be installing the fronius smart meter and leaving out the Victron smart meter upstream of all the electrical loads as the fronius smart meter would be the only meter that needs to determine if the load is dumped into the hot water cylinder or if it is being exported back into the grid. I assume this is correct? Below is an overview of how I would like the final system to look:
I look forward to comments and feedback on the above.
Update CCGx firmware to 2.72 / 2.73 fixed losing comms with BYD batteries - but seems to have broken scheduled charging.
ESS system - 8kw Quattro.
Have tried 2,73 release candidate 1 - no change.
Tried creating new schedule - no change.
Any ideas ?